Lactate dehydrogenase in plants: Distribution and function

Contrary to previous reports, lactate dehydrogenase (LDH; EC 1.1.1.27) occurs in all green land plants ranging from flowering plants to mosses. Conditions must be carefully designed and monitored, however, to achieve detection and extraction, and even then the specific activity is always orders of m...

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Bibliographic Details
Published in:Phytochemistry (Oxford) 1996-06, Vol.42 (3), p.581-587
Main Authors: O'Carra, Pádraig, Mulcahy, Patricia
Format: Article
Language:English
Subjects:
Biological and medical sciences
Enzymes
Fundamental and applied biological sciences. Psychology
Metabolism
Plant physiology and development
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Summary:Contrary to previous reports, lactate dehydrogenase (LDH; EC 1.1.1.27) occurs in all green land plants ranging from flowering plants to mosses. Conditions must be carefully designed and monitored, however, to achieve detection and extraction, and even then the specific activity is always orders of magnitude lower than that typically encountered in animal tissues. Green algae contain even lower levels of an NAD-dependent LDH activity not clearly identified as EC 1.1.1.27. Red and brown algae seem to lack LDH activity entirely. A striking feature of all the flowering plants investigated was a prominent peak of expression of LDH in stem tissue, at, or immediately above, soil level which was paralleled by a similar peak of alcohol dehydrogenase (ADH; EC 1.1.1.1) activity. The possible functional significance of this, and the function(s) of plant LDH generally, are discussed.
ISSN:0031-9422
1873-3700
DOI:10.1016/0031-9422(95)00978-7